U3506
Control Module Input Power B Circuit High
U3506 is an OBD-II diagnostic trouble code meaning: Control Module Input Power B Circuit High. Common causes: generator malfunction, problems with the voltage regulator. Estimated repair cost: $17–111.
Symptoms
- Incorrect operation of the vehicle's electronic systems
- Check engine light comes on
- Malfunctions of the control unit
- Intermittent electrical problems
- Failure of systems dependent on the control unit
Causes
- Generator malfunction
- Problems with the voltage regulator
- Short circuit in power supply
- Wiring harness damage
- Malfunction of the control unit itself
How to Fix
- Check generator voltage
- Inspect the power circuit for damage
- Check voltage regulator
- Test the control unit
- Replace damaged components
Related codes
Error U3506 by Vehicle Brand
FAQ
What does the U3506 code mean?
U3506 is an OBD-II diagnostic trouble code that indicates: Control Module Input Power B Circuit High
What causes a U3506 error code?
The most common causes of U3506 include: Generator malfunction; Problems with the voltage regulator; Short circuit in power supply; Wiring harness damage.
How do I fix a U3506 diagnostic trouble code?
To fix U3506: Check generator voltage. Inspect the power circuit for damage. Check voltage regulator. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U3506?
Do not drive — repair immediately
How much does it cost to fix U3506?
The estimated repair cost for U3506 is $17–111. Actual cost depends on your vehicle, location, and labor rates.
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